In this classic drama of murder and deception a man plays detective as he seeks to discover who killed his wife's first husband. He interviews various suspicious characters: his brother-in-law who, he comes to believe, wants him out of the way so he can take his job (an important civic post); a blind man who "sees" more than he lets on; his own wife, who eventually reveals a shameful secret; and finally an old shepherd who provides the final piece to the whole puzzle. As usual in this genre, death and violence attend the solution to the crime. Name this investigator and the work in which he appears.

All entries (one per person) must be clearly written on postcards and mailed to: Book Bag, The Washington Post, Washington, D.C. 20071, and must include complete return address and competition number. The winning entry will be the first correct answer drawn at random. Employes of The Washington Post Company and their families are not eligible to enter. Entries must be received no later than June 18th. The winner's name and city of residence will be announced in the June 28th issue of Book World. A Washington Post Book World book bag, and a children's book, will be sent to the winner.

Answer to Book Bag #420: The 20th-century poet who lived on a wildly and ruggedly beautiful coast and spent much of his life building a stone tower was Robinson Jeffers. Winner: Ralph Gray, Gaithersburg, Md.